The construction of the Boulder Dam, later the Hoover dam, in Boulder City, Nevada. Construction of the Boulder Dam underway at the dam site in the Black Canyon of the Colorado River. Equipment at work at the site. A crane transports movable sections and place them on the side walls of the dam. An operator at the controls of the crane. Rocky side walls of the canyon. An officer watches the construction work. The tunnel on the dam through which water flows. Onlookers and officials beside the flowing water as the final gates of the dam are closed in the grand opening of the dam. The construction material at the site. Aerial views of the construction site.

Boulder Dam in Boulder City, Nevada. Boulder Dam and the interiors of the power plant and generators. Gauges inside the plant. Water gushes at a high speed from the dam. Production of electricity starts. Aerial view of water gushing out from the dam. A TWA airplane flies over Boulder Dam.

Documents the excavation and construction of the Boulder Dam (Later named Hoover Dam). Boat in a river at the Black Canyon. A man points to the map of United States. Water floods in agricultural district. River in a deep valley between cliffs. Map points out Black Canyon of the Colorado River, on the border between Arizona and Nevada. Deserts of South West. Excavating mountains by truck. Cargo train runs on track. Men work in factories. Industrial equipment. Engineers and surveyors at construction site. Small town (Boulder City) built to house employees. Various buildings of town. Building housing the officers of Pacific administration. Traffic on street and gardens outside houses. White cottages in town. Cooks prepare food in kitchen. Men served in large dining hall. Passenger trucks loaded with workers, moves for dam site. Workers leave trucks at dam site.

Completion of Hoover Dam (then the Boulder Dam) construction in the United States. In September 1935, U.S. President Franklin Delano Roosevelt dedicates the Hoover Dam to the nation's progress and commends its designers and builders, at the dam site. Views of the Hoover Dam showing its beauty and architecture. From a 1962 production about the dam.

A streamlined passenger express train passes by at the Boulder Dam (later Hoover Dam) construction site at Boulder City near Las Vegas, Nevada. The train on a railway track. Interior of the train. Men stand in the train and watch outside. The Colorado River amidst the mountains. View of the countryside. People stand near the railway track. The train passes across a bridge and views of the dam construction underway in Black Canyon.